Rock-drilling machine



(No Model.)

2 Sheets-Sheet l. Y H. DUNHAM.

ROCK DRILLING MACHINE.

ATTORNEYS.

Nv Ferias mm1-mmf. wnhingnm n, n

E. DUNHAM.l BooK DRILLING MACHINE. I

l (No Model.) 4 2 Sheets-Sheet 2. l r L No. 277,244, Patented May-8,1883.

WITNESSES: INVENTOR:

Jfm C@ BY .Z ff@ 4 ATTORNEYS.

UNITED STATES NPATENT OFFICE.

HENRY DUNHAM, OF GLEN AUBREXQNEVV YORK.v

ROCK-DRILl-.ING MACHINE.

SPECIFICATION forming part of Letters Patent No. 277,244, dated May 8, 1833.

Application filed July 3, 1882. (No model.)

To all whom it may concern:

Be it known that I, HENRYY DUNHAM, of Glen Aubrey, in the county of Broome and State of New York, have invented certain new and useful Improvements in Rock-Drilling Machines, ot' which the following is a full,

clear, and exact description.

Y drills.

' The frame A, in which the operative partsV of this drilling-machine are held, is supported by the supporting-frame B, composed of thel bed-pieces A' A and suitable end cross-pieces, B B', and the frame A is adapted to be moved backward and forward upon the supportingframe B-for setting, feeding up, and removing the drills-by means of' the cog-wheels E- E, meshing with the racksl l, formed upon the bedpieces A A' the said wheels being both fixed upon the axle b, and one of them being adapted to be turned bythe worm F, journaled at one side of the frame A, as shown clearly in Fig. l. The forward ends of the parallel bottom pieces a a of the frame A are recessed,

as shown att k, and formed with the tongues it" k', as shown in Fig-3, which recesses and tongues form ways for the movement ofthe drill-holder C, in which the series of drills T are placed and held by the drillclamp D, except when the clamp is raised for turning the drills, as hereinafter described.

The drill-holder C is composed of the parallel side bars c c', titted\a suitable distance apart in the end bars e c', which are extended backward to run in the recesses k k, as shown clearly in Fig. l, and the outer sides of the end bars c c are guttered to tit upon the tongues k k of the side pieces` a a of the frame, as shown in Fig. 3. The parallel bars c c' are correspondingly recessed, as shown at t' t" in Figs. 1 and 3, to form seats for receiving andholding the drill.

The drillclamp D is composed ofthe paralA lel side bars d d. and the end bars f j", which hold the said side bars the same distance apart that the side pieces c c of the drill-holder are held apart in the side bars c e', leaving the same width of space between them as shown in Fig. l, and the bars d d are recessed, as shown at j j', to correspond with the recesses in the bars c c', to t over the drills, as will be understood from Figs. 1, 3, and 4.

To the upper side of the drill-holder C, at the ends thereof, are secured the plates G Gr, which are formed with the projecting plates or uprights g g, which are perforated with a correspondingvseries of holes, as shown clearly in Figs. 2 and 3.

To the outer ends ot' the drill-clamp D are secured the outwardly-projecting plates h l1., which are perforated with holes which are the same distance apart that the holes in the plates g g are, as shown clearly in Figs. 2 and 3and these plates h h fit between the said perforated plates g g, as shown in said tigures, and the platesg g thus serve as guides for the movement of the clamp D'to and from the drill'holder, and said plates and the plates h 7L form means for locking the clamp D in place upon the drill-holder for holding the drills while being struck. This movement of the drill-clamp D to and from the drill-holder is obtained from the bent and pointed levers H H, which are pivoted in the upright plates m m, formed upon or secured to the upper side ofthe end piecesc c of the drill-holder. These levers are so arranged thattheir pointed forward endsoo reach under the drill-clampD and pass through the staples q g, secured in the under side of the clamp, as shown in Fig..l. These levers receiveoscillating motion from thedriving-power of the machine through the rocking sledgecarrying beam J, curved arms K K, secured to the said beam, and the sets of drill-operatin g levers LL and L' L', (or either of them,) which are attached to the ends ot` the curved arms K K by means of the pins n n, passing through the slots n a' of thelevers and the ends of the arms, as shown in Fig. 1, and these levers are pivoted at their lowerends, the former at p p in the cross-pieceMof the frame A, (shown in Fig. 1,) the-latter at pp upon the end pieces ICO e e' o f the drill-holder G, as shown in Fig. 1. The upper ends of the levers H H are attached to the levers L L and L' L' and to the curved arms K K by means of the clevis-lilre attachment i', placed upon the pin n, as shown in' Fig. 1; or any other suitable means may be used. The backward-antl-forward movement of the levers H B, and the consequent up-anddown movement of the pointed lower ends o o of the levers, will raise and lower the clamp D with a positive motion, and this motion imparts, through certain clutch mechanismhereinafter described, partial rotary motion to the drills.

The drill-holder C is attached to the levers L L by the connecting rods or links s s, (shown in Fig. 1,) and by this means the oscillating motion of thelevers imparts reciprocating` motion to the drill-holder, drill-clamp, and drills, and also to the lower ends of the levers L L'.

O O represent bent and pointed pawls or bolts, which are pivoted at their upper ends to the. levers L' L', as shown clearly in Figs. 1 and 2. The lower ends of. these pawls rest in the gutters tt, as shown in Figs. 2 and 3, and

1 l, llillllillillll tml forward in the attached to the lower ends of the rods N', and with the back platen", against which the ends of the rods come in raising the sledges and cause them to be raised parallel with the rods N', as will be understood from Fig. 1. rIhere are as many of these sledges N and rods N' as there are drills,andtherodspass upthrough the rocking beam J, and are held firmly therein by the nuls w w, so that when the beam is rocked the sledges will be raised and brought down forcibly against the outer ends of the drills T for drilling the holes, as clearly illustrated in Figs. 1 and 2.

P represents the arm or double-acting lever by which (through the wire or cord a: x') the beam J is rocked. This arm or lever is by preference passed through the beam, at or near its center, in the same plane with the rods N' N'. The ends of the lever Pare provided with the xed drums or guttered Wheels P' P', around which the cords or wires a: x' are passed, as shown in Fig. 1. From the drums or guttered Wheels the cords no x' pass over suitable pulleys, s' s', placed upon the shaft S,journaled in the upper part of the frame A7 and from these pulleys theypassunder When the frame A is moved forward upon the frame B for drilling, the same is held against backward movement by the dogs Q Q', which are pivoted to the frame A, and are adapted to drop into the racks l l of the frame B, as shown in Fig. 1. The .frame B may be set in various positions for drilling the holes at any angle or pitch as desired. i

The ratchets u are by preference cast of malleable` iron and placed upon the drills while hot, so that when cool they will shrink upon the drills, and may be removed by heating.

The action of the sledges is such that when the drills are forced home to the bottom of the holes by the forward movement of the drillholder, and rmly grasped by the drill-clamp, while being thus held the sledges will be brought heavily against them, and will remain, by reason of not being rigidly attached to the bars, and the lower ends of the bars being slightly in advance of the sledges for a short space of time against them, until the jar and vibration ot' the drill incident to the blow cease. This action causes the drill to cut more rapidly than it would if allowed to rebound immediately upon the delivery ot' the blow. After the holes have been drilled the desired depth the drills may be removed, and wedges may be put in their place and driven into the holes by the sledges for splitting the rock.

A singlewedge may be driven by this machine; or they may be driven in gangs, as the drills are; and by it wedges may be driven in seams or crevices for splitting dag-stones; and when driving wedges the drill-holder, drill-clamp, and levers L, L', and H may be taken out of the machine, so that the wedges may be driven at any place desired, according to the crevice, the sledges being raised or lowered to suit the wedges.

Instead of using a single gang ot' drills or wedges in the machine, thealrill holder and clamp maybe duplicated, so that the machine will carry two or more gangs ofdrills or wedges, if desired, and not depart from the spirit of my invention.

Havngthus described my invention, I claim as new and desire to secure by Letters Patent- `l. The drill-clamp having parallel side bars d d', recessed at j j', and held apart by end bars ff', in combination with the drill-holder having correspondingly-recessed side pieces c c', held apart by the side bars e e', as and for 55 the purpose specified. A

2. The combination, with the holder and clamp-bars c' d', the drill-ratchets u, and dogs U, of the toggle-plates c a', pivoted at their outer ends to said bars c' d', and provided with projections c", whereby the dogs will turn the drills, and then the toggle projections hold them while being struck by the sledges, as described.

3. The combination, with the drill-holder andthe clamp D, having staples q, ofthe bent and poiutedlevers H, pivoted in the drill holder plates m, and having their ends o reaching under the clamp D, as and for the purpose set forth.

4. The combination, with the drill-holder 0,' the clamp D, and levers H,of the rocking beam J, curved arms K, and levers L L', whereby the levers H may be operated, as described. Y

5. The combination ofthe drill-holder C, the clamp D, the oscillating levers L', having pivoted -pawls O, resting in gutters t, and the. perforated clamp -plates g hf, whereby the drills are held when the drills are struck by the Sledge, as described.

6. The combination, with `the ratchets u and dogs U, of the toggles o 1:',bars c d', and clamp D, having an up-and-down movement, whereby the drills will be turned between the sledge blows, as described.

.7. The arm P, carrying pulleys P', the cords k k', the pulleys s' on shaft s, the pulleys fy on shaft y', andan actuating crank-shaft, where by the beaml J is rocked, as described.

8. The combination, with the levers L', provided with pawls or bolts 0, of the drill-holder C and the drill-clamp D, the former being pro- 'vided with the perforated plates g y g g, the

latter with the plates h h, substantially as and for the purposes set forth.

9. The levers L, pivoted in the cross-piece M, or other permanent part of the frame A, in combination with the drill-holder C, beam J, and arms K for reciprocating the drills, as set forth.

10. The frame A, carrying rock-lever P, and beam J, having sledges N, operated by cords or chains a; x', substantially as described, and the drill-actuating devices removably connected to' frame A, whereby holes may be drilled and the drilling devices removed to admit of driving wedges by the sledges N, substantially as set forth.

HENRY DUNHAM.` Witnesses:

G. I. DUNHAM, MrLo M. RILEY.

ICO 

